Asymmetric vortex solitons in nonlinear periodic lattices

Details Asymmetric vortex solitons in nonlinear periodic lattices Asymmetric vortex solitons in nonlinear periodic lattices

2004-03-22

arxiv.org/abs/physics/0403103v1

Phys. Rev. Lett. 93, 063901 (2004)

Physics

Optics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.93.063901

We reveal the existence of asymmetric vortex solitons in ideally symmetric periodic lattices, and show how such nonlinear localized structures describing elementary circular flows can be analyzed systematically using the energy-balance relations. We present the examples of rhomboid, rectangular, and triangular vortex solitons on a square lattice, and also describe novel coherent states where the populations of clockwise and anti-clockwise vortex modes change periodically due to a nonlinearity-induced momentum exchange through the lattice. Asymmetric vortex solitons are expected to exist in different nonlinear lattice systems including optically-induced photonic lattices, nonlinear photonic crystals, and Bose-Einstein condensates in optical lattices.

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